ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  enrefg GIF version

Theorem enrefg 7002
Description: Equinumerosity is reflexive. Theorem 1 of [Suppes] p. 92. (Contributed by NM, 18-Jun-1998.) (Revised by Mario Carneiro, 26-Apr-2015.)
Assertion
Ref Expression
enrefg (𝐴𝑉𝐴𝐴)

Proof of Theorem enrefg
StepHypRef Expression
1 f1oi 5653 . . 3 ( I ↾ 𝐴):𝐴1-1-onto𝐴
2 f1oen2g 6993 . . 3 ((𝐴𝑉𝐴𝑉 ∧ ( I ↾ 𝐴):𝐴1-1-onto𝐴) → 𝐴𝐴)
31, 2mp3an3 1363 . 2 ((𝐴𝑉𝐴𝑉) → 𝐴𝐴)
43anidms 397 1 (𝐴𝑉𝐴𝐴)
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 2203   class class class wbr 4108   I cid 4408  cres 4750  1-1-ontowf1o 5350  cen 6972
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-sep 4227  ax-pow 4286  ax-pr 4321  ax-un 4553
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ral 2525  df-rex 2526  df-v 2814  df-un 3214  df-in 3216  df-ss 3223  df-pw 3670  df-sn 3694  df-pr 3695  df-op 3697  df-uni 3914  df-br 4109  df-opab 4171  df-id 4413  df-xp 4754  df-rel 4755  df-cnv 4756  df-co 4757  df-dm 4758  df-rn 4759  df-res 4760  df-ima 4761  df-fun 5353  df-fn 5354  df-f 5355  df-f1 5356  df-fo 5357  df-f1o 5358  df-en 6975
This theorem is referenced by:  enref  7003  eqeng  7004  domrefg  7005  mapdom1g  7099  fidifsnen  7124  nnfi  7126  onenon  7479  oncardval  7481  cardonle  7482  dju1en  7519  xpdjuen  7524  iseqf1olemqf1o  10864  hashun  11164  lgseisenlem2  15931
  Copyright terms: Public domain W3C validator